Add set ip with new IpSettingsDialog.

src/json/jsonobject.cpp

@@ -58,7 +58,6 @@ void JsonObject::init()
     mLockScreenTime = QString(getJsonString("general", "lockscreen")).toInt();
     mStorageAlarmSize = getJsonString("storagepolicy", "mininum");
     mInterfaceName = QString(getJsonString("address", "device"));
-    mDhcp = QVariant(QString(getJsonString("address", "dhcp"))).toBool();
     mGateway = QString(getJsonString("routing", "defaultgateway"));
     mScanConfirm = getBool("general","ScanConfirm");
     mCompleteNotify = getBool("general","CompleteNotify");
@@ -476,14 +475,13 @@ void JsonObject::setInterfaceName(const QString& name)
 
 bool JsonObject::isDHCP()
 {
-    return mDhcp;
+    return mDefaultIpAddress.dhcp;
 }
 
 void JsonObject::autoDHCP(bool ena)
 {
-	QString str = QVariant(ena).toString();
-	setJsonString("address", "dhcp", str.toStdString().c_str());
-    mDhcp = ena;
+    setBool("address","Dhcp", ena, true);
+    mDefaultIpAddress.dhcp = ena;
 }
 
 IpAddr JsonObject::getDefaultIpAddr()